on mitt romney's part, his advisers say he has to get more specific about his economic policy. that's what voters want to hear. as you say, he has been preparing really for months now sparring with senator rob portman standing in as president obama. for president obama's part, he has got to explain to voters why he deserves another four years when the economic -- the unemployment rate, remember, is still above 8%. so that is his challenge. he is here preparing in henderson, nevada, and i can tell you advisers say his big goal is really to give sharper, crisper answers and to not come off as too professorial. >> one man who isn't afraid to raise expectations is new jersey governor chris christie who says we will wake up on thursday morning with the race turned upside down, but given the very latest polling, particularly in the swing states k a single debate really swing things in the way mr. christie suggests? >> reporter: well, martin, i think if you talk to political analysts and also advisers on both sides, they say that this idea that one debate is going to be a game changer